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MRT Laboratories, Inc.

For more than 30 years MRT Laboratories, Inc. has kept its customers up to date with the latest information on allergy testing

Stay up to date on the latest testing methods we use, allergens we offer, seasonal and regional allergy management advise and advantages for using MRT Laboratories, Inc. as your prefered allergy test provider


Component testing can help clinicians decode peanut allergy

Discover how peanut allergen component testing can support your diagnosis and prepare more effective management plans for allergy sufferers

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Information about some of the most common allergens

From food to dust mite and everything in between, find out more about food, season specific, mold, epidermal and mite allergens

 View our full list of allergens

Category Category Description Allergen Allergen Description
Food Additives Our inventory includes a reagent for use in identifying allergen specific IgE and IgG4 reactivity to the orange/red coloring called annatto. Bixin is the oil soluble material obtained from the annatto seed and norbixin is the water soluble extract obtained by saponification from bixin. Norbixin is added to foodstuffs for color. Our reagent is annatto (norbixin) Annatto (Annatto, Annato), bixin, norbixin Red color; derived from a tree (Bixa orellana); used as a body paint, fabric dye, digestive aid and expectorant; used to dye cheese, butter, margarine, cereals, snack foods, soaps, textiles and varnishes; known to cause urticaria (nettle rash).
Cochineal, Carminic acid, Carmines Red color Made from insects, used in coloring cosmetics and foods: candy, ice cream, juice drinks, yogurts, artificial crab/lobster products, fruit fillings, syrups.
Quinoline Yellow FD&C Yellow No.10 Used in lipsticks, hair products,colognes: also in a wide range of medications.
FD&C Yellow No. 5 Tartrazine Used in beverages, baked goods, pet foods, desserts, candy, confections, cereal, ice cream.
FD&C Yellow No.6 Sunset yellow, orange yellow Used in cereals, bakery, sweets, snack foods, ice cream, drinks and canned fish; synthetic; also in many medications including Polaramine, Ventolin syrup.
Glutamic Acid An amino acid: The salt is monosodium glutamate (MSG) which functions as a flavor enhancer in meats. It also is a nutrient, dietary supplement, and salt substitute.
Tree Pollens The American Elm Blooms in early February in the South and in March and April in the North.
Box Elder Maple Most potent of the maples, also blooms in February in southern areas and in April and May in northern and mid-western regions.
Sycamores The pollen of Sycamores is considered to be moderately allergenic and is shed in April and May.
Birch and Oak April and May are also the “pollen release” months, in northern areas, for the powerful Birch and mighty Oak trees. This period is one to two months earlier in the South
Ash Widespread and blooms in February and March in the South. May is the month for the North.
Walnut, Hickory and Pecan Pecan pollen is a problem from Texas to the Southeast, blooming from March to May. The pollen from Walnut, Hickory and Pecan trees is reported to be large and does not travel a great distance, but does cause local allergy problems in some areas
Acacia and Mesquite Primarily insect-pollinated, but do cause problems in the Southwest. Mesquite may be a problem from May through July; whereas the Acacia blooms from January to November
Mountain Cedar In Texas, the Mountain Cedar produces copious amounts of pollen and can be a problem from October through January.
Mold Allergens Alternaria Tenuis Considered to be one of the most important allergenic molds, is an outdoor mold and appears in warm weather. It occurs on plants and soil.
Aspergillus Fumigatus Grows in a wide temperature range and has been found in soil, decaying leaves, plants, vegetables, bird droppings and tobacco.
Candida Albicans Is seldom air borne. It, too, is found in soil and organic debris.
Cladosporium Herbarum (Hormodendrum) Is found in uncleaned refrigerators, houses with poor ventilation and in soil. It usually appears in spring and spore counts peak in late summer.
Epicoccum Is reported to be one of the most important sources of spores isolated outdoors. Spores are present in calm, dry weather. It can be observed on decaying plants and paper and in soil.
Fusarium Sporulates in warm, wet weather and is found world-wide on grasses, plants and soil.
Helminthosporium Spores are released on dry, hot days. Species of this fungus are known as parasites of cereals and grasses.
Mucor Racemosus Primarily a soil fungus is also considered an indoor mold and has been found in floor dust in houses.
Penicillium Notatum The blue-green mold found on stale bread, fruits and nuts. It is found in soil and reaches its peak in winter and spring.
Phoma Another soil fungus, is also found in-doors on damp surfaces.
Pullularia Found “everywhere”…inside, outside, kitchen, bathroom. This is the mold that deposits spores on leaves in summer and begins decomposition in autumn. It also appears on surface soil and grains.
Rhizopus The spores of Rhizopus are released in hot, dry weather. It has been isolated from both cultivated and non-cultivated soils.
Stemphylium Spores are dispersed in large numbers on sunny, dry days. It is found in soil and has been seen on tomatoes, wheat, barley and the leaves of citrus.
Epidermals The appearance of an animal can trigger many emotions in people, ranging from joy to fear. To an allergic patient, a “cute” cat, dog, bird, rabbit, guinea pig or hamster can provoke reactions ranging from eye and nose inflammation to asthma. Cats Head the list as the most allergenic of the animal species. At present, a non-allergic breed does not exist. Cat allergen has been found where felines have never visited. The allergen is carried on clothing and has been identified in schools, offices, etc.
Dog The American Kennel Club may have guidance on which canines may be less allergic than others.
Guinea Pig The guinea pig has moved from being only a laboratory animal to the classification of pet.
Hamsters, rabbits and ferrets Hamster allergens seem to be strong sensitizers. These animals have also increased in popularity as pets
Birds Respiratory problems have been reported in people keeping birds. Feathers, serum proteins and droppings are sources of exposure.
Horse Is a source (of course, of course) of a very potent allergen. Indirect contact with a horse may provoke symptoms in an atopic individual.
Goose, duck and chicken Feathers are used in bedding and outer “winter wear.” They may be comfortable and warm but a potential problem for the allergic person.
Mites The “mighty” mite is the major allergenic component in house dust. The microscopic arachnid has a life cycle of about 3 months. Female mites, laying up to 50 eggs produce a new generation about every three weeks. D. farinae and D. pteronyssinus Dust mites live in mattresses, bedding, carpeting, upholstered furniture, curtains, wall hangings and stuffed animals. It is easy to see why they are found in abundant numbers in bedrooms.